Federal prosecutors are stepping up their case against a big poker website. In Manhattan Tuesday, U.S. Attorney Preet Bharara filed additional charges against Ireland-based Full Tilt Poker. Earlier this year, the U.S. banned Americans from accessing many online poker sites.

DAVID GREENE, Host:

NPR's business news starts with doubling down against online poker.

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GREENE: Federal prosecutors are stepping up their case against a big poker website. Yesterday, Manhattan U.S. Attorney Preet Bharara filed additional charges against the Ireland-based Full Tilt Poker, calling the site a global Ponzi scheme. Earlier this year, the U.S. banned Americans from accessing many online poker sites. According to the charges, when players went to pull money from online accounts that were supposedly reimbursable, the sites did not have enough funds for the payouts.

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